375 research outputs found

    Riverine Carbon Cycling as a Function of Seasonality

    Get PDF
    Montana has one of the most dynamic climate regimes in all of the United States, with seasonal changes spanning a large range of temperatures.  In Montana, we depend on water originating from snow and glacial melt. These freshwater ecosystems are considered to be some of the most vulnerable to climate change on Earth.  Glacially fed ecosystems are unique habitats for a vast array of life and geochemical processes, including carbon cycling. In order to study carbon cycling in environments vulnerable to change, an interdisciplinary approach including biogeochemical analyses of river DOM production and external allochthonous inputs is necessary to evaluate the impacts of climate change.  The overarching hypothesis for this work is: Seasonal changes in Montana rivers will cause shifts in carbon cycling as ecosystems respond to changes in temperature.  Unlike our initial hypothesis that the amount of sunlight and temperature would play a bigger role in what was happening, the time of the year was much more significant. In Big Sky OC levels in June for the sunny and canopy covered reaches were similar, 1.24 and 1.23 mg C/L, respectively; whereas at the end of July OC in the sunny reach was 0.42 mg C/Land the canopy cover reach was 0.955 mg C/L. The same trend is seen for the urban location in Bozeman. Cell abundance in the reaches followed similar trends, which were not solely based on temperature

    Carsey Perspectives: New Hampshire's Electricity Future

    Get PDF
    Over the past decade a number of factors have transformed global and national energy markets. Access to low-cost natural gas has been a significant part of this trend. Nationally, natural gas-fired power generation was expected to have exceeded coal-fired power generation for the first time in 2016,  and in New England about 50 percent of electricity is now generated from natural gas. With natural gas now such a large part of New England's energy mix, there is a concern that the demand for heating and electricity during cold periods will cause spikes in wholesale electricity prices and that demand may be greater than the available pipeline capacity to deliver natural gas. The region's utility industry has proposed the expansion of pipeline capacity to meet this seasonal increase in the demand for natural gas

    Carsey Perspectives: New Hampshire\u27s Electricity Future; Cost, Reliability, and Risk

    Get PDF
    May 2017 update PointLogic Energy, a source for natural gas pipeline flow and capacity in the original report, has recently updated its models for calculating natural gas flow in the Tennessee Gas Pipeline in New England. This model update has resulted in significant changes to their previous estimates. Most importantly, data obtained from PointLogic Energy in December 2016 supported the finding that overall net gas flow in the “Tennessee Gas Pipeline: NY to MA” was from Massachusetts to New York from 2013–2016; their revised models indicate a net flow during the same period from New York to Massachusetts. To be conservative, we have removed analysis of natural gas pipeline flow and capacity from this report that relied on the original data obtained from PointLogic Energy. Instead, we use estimates of natural gas pipeline flow and capacity published in a 2014 ICF International report that was commissioned by ISO New England (Exhibit 2-3, pp. 12)a and information provided by the U.S. Energy Information Administration.b Please click here to read the previous version of this publication. In this perspectives brief, authors Cameron Wake, Matt Magnusson, Christine Foreman, and Fiona Wilson examine the cost of electrical power in New Hampshire and New England, the reliability of the electrical power system in terms of its ability to meet demand, and the risk New Hampshire ratepayers might face from various proposals to secure or increase the supply of electricity. They find evidence that near-term levels of demand and supply pose no threat to grid reliability, that current pipeline capacity is adequate, and that better contracting practices and other “soft-infrastructure” changes combined with the promotion of energy efficiency and renewable energy will have at least as large a return on investment as expanded pipeline capacity, without exposing ratepayers to higher electricity rates stemming from expensive infrastructure investments

    Besant beginnings at the Fincastle site : a late middle prehistoric comparative study on the northern plains

    Get PDF
    xii, 183 leaves : ill. (chiefly col.) ; 29 cmThe Fincastle Bison Kill Site (DlOx-5), located approximately 100 km east of Lethbridge, Alberta, has been radiocarbon dated to 2 500 BP. Excavations at the site yielded an extensive assemblage of lithics and faunal remains, and several unique features. The elongated point forms, along with the bone upright features, appeared similar to those found at Sonota sites within the Dakota region that dated between 1 950 BP and 1 350 BP. The relatively early date of the Fincastle Site prompted a re-investigation into the origins of the Besant Culture. The features, faunal and lithic assemblages from twenty-three Late Middle Prehistoric sites in Southern Alberta, Saskatchewan, Montana, Wyoming, and the Dakotas were analyzed and compared. The findings show that Fincastle represents an early component of the Besant Culture referred to as the Outlook Complex. This analysis also suggests a possible Middle Missouri origin of the Fincastle hunters, as well as the entire Besant Culture

    Effects of Goal Type and Reinforcement Type on Self-Reported Domain-Specific Walking Among Inactive Adults: 2×2 Factorial Randomized Controlled Trial

    Get PDF
    Background: WalkIT Arizona was a 2×2 factorial trial examining the effects of goal type (adaptive versus static) and reinforcement type (immediate versus delayed) to increase moderate to vigorous physical activity (MVPA) among insufficiently active adults. The 12-month intervention combined mobile health (mHealth) technology with behavioral strategies to test scalable population-health approaches to increasing MVPA. Self-reported physical activity provided domain-specific information to help contextualize the intervention effects. Objective: The aim of this study was to report on the secondary outcomes of self-reported walking for transportation and leisure over the course of the 12-month WalkIT intervention. Methods: A total of 512 participants aged 19 to 60 years (n=330 [64.5%] women; n=425 [83%] Caucasian/white, n=96 [18.8%] Hispanic/Latinx) were randomized into interventions based on type of goals and reinforcements. The International Physical Activity Questionnaire-long form assessed walking for transportation and leisure at baseline, and at 6 months and 12 months of the intervention. Negative binomial hurdle models were used to examine the effects of goal and reinforcement type on (1) odds of reporting any (versus no) walking/week and (2) total reported minutes of walking/week, adjusted for neighborhood walkability and socioeconomic status. Separate analyses were conducted for transportation and leisure walking, using complete cases and multiple imputation. Results: All intervention groups reported increased walking at 12 months relative to baseline. Effects of the intervention differed by domain: a significant three-way goal by reinforcement by time interaction was observed for total minutes of leisure walking/week, whereas time was the only significant factor that contributed to transportation walking. A sensitivity analysis indicated minimal differences between complete case analysis and multiple imputation. Conclusions: This study is the first to report differential effects of adaptive versus static goals for self-reported walking by domain. Results support the premise that individual-level PA interventions are domain- and context-specific and may be helpful in guiding further intervention refinement

    Linking research and practice to address domestic and sexual violence: Lessons learned from a statewide conference with researchers and practitioners

    Get PDF
    Purpose - There is a growing emphasis on the need to integrate research and practice in the fields of domestic and sexual violence. However, additional research is needed to identify strategies for key stakeholders to use to bridge research and practice in these areas. The paper aims to discuss these issues.Design/methodology/approach - The current study analyzed qualitative data collected during a statewide conference for researchers and practitioners whose work addresses domestic and/or sexual violence.Findings - The findings provide information about building effective researcher-practitioner collaborations, developing methodologically sound studies that address practice-relevant research questions, and identifying steps that funders, state coalitions, researchers, and practitioners can take to advance the integration of research and practice.Research limitations/implications - Additional research is needed to evaluate specific approaches to better integrating research and practice related to domestic and sexual violence.Practical implications - Researcher-practitioner collaborations offer numerous benefits to advancing research and practice related to domestic and sexual violence. Additional guidance and tangible support is needed to foster these collaborations.Originality/value - This study used data collected during an innovative conference that brought together researchers and practitioners. The data have implications for furthering the integration of research and practice related to domestic and sexual violence

    Investigation relative to the Roentgen Satellite (ROSAT)

    Get PDF
    Reports include: High Resolution Observations of the Central Region of M31; The X-ray Emission of Low-X-ray-Luminosity Early-Type Galaxies: Gas Versus Compact Sources; Interaction Between Cluster Gas and Radio Features of Cygnus A; Hot Gas and Dark Halos in Early-Type Galaxies; A Gravitational Lens in X-rays - 0957+461; How Massive are Early-Type Galaxies?; Three Crab-Like SNR in the Large Magellanic Cloud; and Soft X-ray Emission from Boundary Layers in Cataclysmic Variables. Papers submitted to the Astrophysical Journal are attached

    Rapidly Fatal Acanthamoeba Encephalitis and Treatment of Cryoglobulinemia

    Get PDF
    We describe a 66-year-old woman with therapy-refractory cryoglobulinemia treated with rituximab, plasmapheresis, and steroids; a case of fatal meningoencephalitis caused by Acanthamoeba spp. then developed. Such infections are rare and show an unusually rapid course (possibly related to rituximab)

    Prenatal exome sequencing in anomalous fetuses: new opportunities and challenges

    Get PDF
    We investigated the diagnostic and clinical performance of exome sequencing (ES) in fetuses with sonographic abnormalities with normal karyotype, microarray and, in some cases, normal gene specific sequencing

    Prediction of 7-year psychopathology from mother-infant joint attention behaviours: a nested case–control study

    Get PDF
    <br>Background: To investigate whether later diagnosis of psychiatric disorder can be predicted from analysis of mother-infant joint attention (JA) behaviours in social-communicative interaction at 12 months.</br> <br>Method: Using data from a large contemporary birth cohort, we examined 159 videos of a mother-infant interaction for joint attention behaviour when children were aged one year, sampled from within the Avon Longitudinal Study of Parents and Children (ALSPAC) cohort. Fifty-three of the videos involved infants who were later considered to have a psychiatric disorder at seven years and 106 were same aged controls. Psychopathologies included in the case group were disruptive behaviour disorders, oppositional-conduct disorder, attention-deficit/hyperactivity disorder, pervasive development disorder, anxiety and depressive disorders. Psychiatric diagnoses were obtained using the Development and Wellbeing Assessment when the children were seven years old.</br> <br>Results: None of the three JA behaviours (shared look rate, shared attention rate and shared attention intensity) showed a significant association with the primary outcome of case–control status. Only shared look rate predicted any of the exploratory sub-diagnosis outcomes and was found to be positively associated with later oppositional-conduct disorders (OR [95% CI]: 1.5 [1.0, 2.3]; p = 0.041).</br><br>Conclusions: JA behaviours did not, in general, predict later psychopathology. However, shared look was positively associated with later oppositional-conduct disorders. This suggests that some features of JA may be early markers of later psychopathology. Further investigation will be required to determine whether any JA behaviours can be used to screen for families in need of intervention.</br&gt
    corecore